Flow MeasurementInstrumentation

What is TORBAR?


The TORBAR is a multi port self-averaging flow meter. Its designs is similar to the pitot tube (which is used for fluid flow measurement). Many industries have been used TORBAR since 1985

How TORBAR Works

According to the flow rate in the pipeline Torbar produces a differential pressure i.e. proportional to the square of flow rate.

 TORBAR produces an averaged differential pressure (DP) signal proportional to the square of the flow rate. The DP output is piped to a DP transmitter in order to generate an electrical signal (ma) prop. to flow. We can also connect a DP transmitter to TORBAR with the help of manifold valve (3 way).


  • Outer impact tube – ONE PIECE CONSTRUCTION
  • Head
  • Internal averaging tube
  • Low pressure chamber

  • There are number of pressure sensing holes situated in the outer impact tube, facing upstream which are positioned at equal annular points in accordance with a log-linear distribution.
  • The total pressure developed in the torbar is averaged 2 times.
  • The “total pressures” developed at each upstream hole by the impact of the flowing medium are firstly averaged within the outer impact tube and then to a second order (and more accurately) averaged within the internal averaging tube. This pressure is represented at the head as the high pressure component of the DP output.
  • At the downside of the outer impact tube, the low pressure component is sensed by a single hole.

Features and Benefits 

  • Optional direct mounting transmitter arrangement
  • Low permanent pressure loss means low energy consumption – and significant cost benefits
  • Low installation costs
  • Long term accuracy
  • Low maintenance costs


  • Oil production (onshore, offshore)
  • Oil refining
  • Chemical
  • Pharmaceutical
  • Power generation


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